Výsledky vyhledávání - "Frédéric Chazallet"

Akademický článek

A New Optical Sensor Based on Laser Speckle and Chemometrics for Precision Agriculture: Application to Sunflower Plant-Breeding

Autor: Maxime Ryckewaert, Daphné Héran, Emma Faur, Pierre George, Bruno Grèzes-Besset, Frédéric Chazallet, Yannick Abautret, Myriam Zerrad, Claude Amra, Ryad Bendoula

Publikováno v: Sensors, Vol 20, Iss 16, p 4652 (2020)

New instruments to characterize vegetation must meet cost constraints while providing accurate information. In this paper, we study the potential of a laser speckle system as a low-cost solution for non-destructive phenotyping. The objective is to as

Externí odkaz: https://doaj.org/article/8b2a14e9981a487db8a44f02e9c50285

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Thin film terahertz reverse engineering to analyse vegetal tissues

Autor: Xavier Buet, Claude Amra, Bruno Grezes-Besset, Daphné Héran, Ryad Bendoula, Yannick Abautret, Frédéric Chazallet, Gabriel Soriano, Myriam Zerrad, Dominique Coquillat

Publikováno v: Proc. SPIE 11872, Advances in Optical Thin Films VII, 1187209 (12 September 2021)
SPIE OPTICAL SYSTEMS DESIGN
SPIE OPTICAL SYSTEMS DESIGN, Sep 2021, Madrid, Spain. ⟨10.1117/12.2597056⟩

International audience; Thin film techniques also find applications outside their classical sectors, and among them is the terahertz field. These waves allow to penetrate a large variety of materials opaque to optics, and find applications in securit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eca027f46aa0f06058f07f2a35424565
https://hal.archives-ouvertes.fr/hal-03413162

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A New Optical Sensor Based on Laser Speckle and Chemometrics for Precision Agriculture: Application to Sunflower Plant-Breeding

Autor: Daphné Héran, Maxime Ryckewaert, Ryad Bendoula, Myriam Zerrad, Claude Amra, Pierre George, Bruno Grezes-Besset, Yannick Abautret, Emma Faur, Frédéric Chazallet

Publikováno v: Sensors (Basel, Switzerland)
Sensors
Sensors, MDPI, 2020, 20 (16), pp.4652. ⟨10.3390/s20164652⟩
Volume 20
Issue 16
Sensors, Vol 20, Iss 4652, p 4652 (2020)
Sensors, 2020, 20 (16), ⟨10.3390/s20164652⟩
Sensors, 2020, 20 (16), pp.4652. ⟨10.3390/s20164652⟩

International audience; New instruments to characterize vegetation must meet cost constraints while providing accurate information. In this paper, we study the potential of a laser speckle system as a low-cost solution for non-destructive phenotyping

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bcf62a3516f17ea81025f4a07576b437
http://europepmc.org/articles/PMC7472371

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Optical thickness of a plant leaf measured with THz pulse echoes

Autor: Frédéric Chazallet, Ryad Bendoula, Claude Amra, Bruno Grezes-Besset, Yannick Abautret, Daphné Héran, Gabriel Soriano, Myriam Zerrad, Dominique Coquillat

Publikováno v: Proceedings of SPIE
TERAHERTZ, RF, MILLIMETER, AND SUBMILLIMETER-WAVE TECHNOLOGY AND APPLICATIONS XIII, 2020
TERAHERTZ, RF, MILLIMETER, AND SUBMILLIMETER-WAVE TECHNOLOGY AND APPLICATIONS XIII, 2020, 2020, San Francisco, United States. pp.112790L, ⟨10.1117/12.2543710⟩

We analyze Terahertz (THz) echoes by reflection on a sunflower leaf in order to evaluate the internal leaf structure (geometry, complex indices and thicknesses). The analysis is based on the thin film multilayer formalism in time and frequency domain

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82609a42226d8761398cb6d085502abb
https://hal.inrae.fr/hal-02978005

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Narrow-band filters for ocean colour imager

Autor: Catherine Grèzes-Besset, Frédéric Chazallet, Julien Archer, Laurent Kirchgessner, Didier Torricini, Hélène Krol

Publikováno v: International Conference on Space Optics — ICSO 2008.

During the last few years, the evolution of deposition technologies of optical thin films coatings and associated in-situ monitoring methods enables us today to successfully answer the increasingly request of space systems for Earth observation. Geos

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d02754ff1ef4f01f1f5ddcd1255428c8
https://doi.org/10.1117/12.2308242

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Mitigation of atmospheric effects by adaptive optics for free-space optical communications

Autor: Vincent Michau, Nicolas Vedrenne, Frédéric Chazallet, Marie-Thérèse Velluet, Noah Schwartz

Publikováno v: SPIE Proceedings.

Data-rates of long-range free-space optical communication links are deteriorated by atmospheric turbulence which causes power in the bucket fluctuations. In order to compensate for those effects the use of adaptive optics is envisioned. Different sol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9f47ef3c7bdb2ec11592a028a5858314
https://doi.org/10.1117/12.808142

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Efficiency of polarimetric z probing in optical multilayers

Autor: Carole Deumie, Claude Amra, Catherine Grèzes-Besset, Frédéric Chazallet, Gaëlle Georges

Publikováno v: Applied optics. 47(13)

Numerical calculation is performed to validate the principles of a single optical technique devoted to real time probing or imaging of submultilayers within interferential coatings.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14d07a92a8be6f7dc1523cdcbe6fa6fb
https://pubmed.ncbi.nlm.nih.gov/18449259

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From angle-resolved ellipsometry of light scattering to imaging in random media

Autor: Nora Le Neindre, Frédéric Chazallet, Myriam Zerrad, Gaëlle Georges, Laure Siozade, Laurent Arnaud, Carole Deumie, Claude Amra

Publikováno v: Applied optics. 47(13)

A procedure is described to allow selective cancellation of polarized scattering within optical substrates and multilayers. It is shown how bulk scattering (respectively surface) can be directly eliminated while the remaining roughness (respectively

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fef9ded4b9eea9374bbba2fd69e8b88a
https://pubmed.ncbi.nlm.nih.gov/18449255

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Multi-Wavelength Optical Monitoring for Infrared Complex Functions: Application to Process Improvement

Autor: Hélène Krol, Nathalie Valette, Frédéric Chazallet, Mireille Commandre, Didier Torricini, Laurent Gallais, Catherine Grèzes-Besset, Jean-Yves Natoli, Julie Poupard

Publikováno v: Optical Interference Coatings.

Use of an infrared direct optical monitoring is presented for realization of complex stacks requiring optical performances on different spectral ranges for infrared applications. Such system is used for process improvement in laser damage application

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::52b305b494f2d26fa8aefb979d249ca2
https://doi.org/10.1364/oic.2007.wc9

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Real-time lateral optical monitoring for the production of complex multilayer stacks

Autor: Catherine Grèzes-Besset, Frédéric Chazallet, Didier Torricini

Publikováno v: SPIE Proceedings.

We present a direct optical monitoring system that allows to minimize in-situ shift of parameters during process. In particular, we show how real-time optical monitoring on one or several lateral samples located on the same circumference of final com

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0fd7f7a04ce4424077a24d5bf466c60a
https://doi.org/10.1117/12.625110

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